Katie If you are going to listen for these borers then late spring/early summer may be best time. Amplified, digitized, and recorded sound of their activity has been described in a recent WAG paper by a French person, and not yet online/published. Listening can help monitor, but not solve the problem. Is your issue with wood beams (structural) or decorative material? Hugh Glover. WACC
On Fri, May 21, 2010 at 5:05 PM, <[email protected]> wrote: > With training a stethoscope can be used. You need to discern background > noise from insect sounds. Most of us have lazy ears. > > Freezing and warming cycles are not good for wood Art, specially mixed > media. Mixed media has different contraction rates, does not respond well to > dramatic temperature change. Some will say they did it without consequences, > may be luck. You need to understand the risk and how much you are willing to > gamble. > > CO2 measurements can be obtained down to parts per billion. You can use > this method to monitor one insect in an object. It does take time and > experience. With newly developed equipments times have been cut to a few > hours. Ten years ago almost 8 hours on a FTIR. > With good equipment a CO2 analyzer balanced with a O2 analyzer can offer > some results without an FTIR. > > Bill > ACI > > In a message dated 5/21/2010 4:42:41 P.M. Eastern Daylight Time, > [email protected] writes: > > > > Katie - > > Hydrogen phosphide is not a good penetrator of wood for control of ppbs. > If the items are small a freezing process, followed by a warming, then > plunging the materials again into freezing will elimiinate active > infestations in wood. > > The first time do it at -20 degress F for 72 hours; then warm the object up > to room temperature, then freeze 'em again for 3 days at -20 degress F. > Your problem will be elimanated. > > Tom Parker > > > > -----Original Message----- > From: Katie Fisher <[email protected]> > To: [email protected] <[email protected]> > Sent: Fri, May 21, 2010 2:02 pm > Subject: [pestlist] detecting woodborers > > Hi, > > My name is Katie Fisher and I’m the new Pest Control Technician at the > Glenbow Museum. I just wanted to ask a somewhat out-there question regarding > the detection of wood borers… this museum has been battling Powderpost > Beetles for quite a while. Every 5 or so years a new wave will appear, a > large-scale treatment process will happen (phosphene), but it just doesn’t > seem to be effective in getting rid of the Powderpost population. > > Since it takes years for them to exit the wood, I feel like I’m somewhat > just twiddling my thumbs in the meantime, wondering if the last treatment > did the trick. A friend suggested that I might be able to use a stethoscope > to hear the larva inside the wood… does anyone do this, to detect > woodborers? Does anyone think it would be at all effective in hearing them? > > Cheers, > Katie > > Katie Fisher > Pest Control Technician > Glenbow Museum > 130-9th Avenue S.E. > Calgary, Alberta T2G 0P3 > Tel (403) 268-4235 > Fax (403) 265-9769 > [image: riopelle painter email 2.png] > > >
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